Fix bug with hung web worker (#3096)

* Fix bug with hung web worker

* Added upper limit to stop property of active chunk request

* Add web worker fix to changelog

* Bump to version 3.12.1

CHANGELOG.md

@@ -28,6 +28,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Export of instance masks with holes (<https://github.com/openvinotoolkit/cvat/pull/3044>)
 - Changing a label on canvas does not work when 'Show object details' enabled (<https://github.com/openvinotoolkit/cvat/pull/3084>)
+- Make sure frame unzip web worker correctly terminates after unzipping all images in a requested chunk (<https://github.com/openvinotoolkit/cvat/pull/3096>)
 
 ### Security
 

cvat-core/package.json

@@ -1,6 +1,6 @@
 {
   "name": "cvat-core",
-  "version": "3.12.0",
+  "version": "3.12.1",
   "description": "Part of Computer Vision Tool which presents an interface for client-side integration",
   "main": "babel.config.js",
   "scripts": {

cvat-core/src/frames.js

@@ -286,7 +286,7 @@
                                 if (nextChunkNumber * chunkSize < this.stopFrame) {
                                     provider.setReadyToLoading(nextChunkNumber);
                                     const nextStart = nextChunkNumber * chunkSize;
-                                    const nextStop = (nextChunkNumber + 1) * chunkSize - 1;
+                                    const nextStop = Math.min(this.stopFrame, (nextChunkNumber + 1) * chunkSize - 1);
                                     if (!provider.isChunkCached(nextStart, nextStop)) {
                                         if (!frameDataCache[this.tid].activeChunkRequest) {
                                             frameDataCache[this.tid].activeChunkRequest = {